Guide blade device for elastic fluid machines



June 27, 1933. o. A. WIBERG GUIDE BLADE DEVICE FOR ELASTIC FLUIDMACHINES Filed March 19, 1951 Fatented June 27, 1933 I ISESASQ barrenSTATES PATENT crates OSCAR ANTON \VIBERG, OF FINSPONG, SVIEIDEN GUIDEBLADE DEVICE FOR ELASTIC FLUID MACHINES Application filed March 19,1931, Serial Ho. 523,807, and in Sweden March 31, 1930.

This invention relates toguide blade devices, and more particularly tosuch devices which are adapted to be used inconnection with radial flowelastic-fluid turbines having one or more expansion stages for axialadmission. Tt is to be noted, however, that the invention is notrestricted to such turbines but may beapplied to other elastic-fluidmachines, as, for instance, compressors.

The object of this invention is to enable a simple mounting anddismantling of the guide blade device, a reliable supporting thereof,and a. relief of the device from the load due to pipe lines dependingtherefrom "-rvhich may cause deformations and, on the whole, to reducethe necessary pipe lines to a minimum.

A feature of the invention involves the provision on the guide bladedevice of one or more supporting legs which are arranged so as to permitplacing of the guide blade device on suitable parts of the stationarycasing of the respective machine or on stays or similar parts rigidlyconnected to the casin order that the guide blade device may e wholly orpartially supported by said legs.

In the accompanying drawing, one embodiment of the invention isillustrated as applied to a radial flow turbine having blades and discsrotating in opposite directions and having further one axial flowexpansion stage at each side.

With reference to the drawing, Fig. 1 is a diagrammatical cross sectionof the turbine housing and the guide blade device for the axial flowexpansion stages. Figs. 2a, 2b and 20 show vertical longitudinalsections of part of the turbine housing. Moreover, Fig. 2a is a sectiontaken on line 2a-2a of F 1 of part of the blade system, whereas Fig. 2bshows the discharging pipe line lead- .ing from the guide blade device,partly in section taken on line 2b2b of Fig. 1. Fig. 2c is a verticallongitudinal view partly in section, taken on line 2020 of Fig. 1.

The turbine housing shown in the drawing comprises one upper member 1and one lower member 2. The lower member rests upon a connecting piece 3serving as steam outlet of the turbine which leads to a condenser, notshown. The lower member 2 of the turbinehousing is strengthened bytransversely extending stays 4 which are formed as brackets 5 to supportthe casing of the guide blade device. Said casing likewise comprises oneupper member 6 and one lower member 7. The casing 5, 7 contains two ormore rows of guide blades 8, though two such rows only are shown in thedrawing, each of which belongs to an individual rotary wheel 9'fol-axial admission of the driving fluid. i aid rotary wheels 9 aresituated on opposite-sides of a space 11 surrounding the radial flowsystem 10 of the turbine which receives the driving fluid escaping fromthe blade system 10, and from which space said drlvmg fluid will bedistributed by the guide blade rings 8, 8 to opposite sides to act uponthe two axialfiow wheels 9, 9.

Resting on said brackets 5, 5 is the lower member 70f the guide bladecasing, said casing having to this end supporting legs 12, 12. In thedesign illustrated in the drawing, said supporting legs base flangescorresponding to the brackets 5, the interior of said legs communicatingat the top with the interior of the cover 6, 7 and at the bottom withholes 13 formed in the stays 4. Connected to the lower end of said holes13 are pipes 1 1 bolted to flanges of the stays 4 which extend to theoutside either through the wall of the connecting piece 3, as shown, orthrough the lower member of the turbine housing. By way of theconnections 12, 13, 1 1- driving fluid may be discharged from the space11 between the guide blade rings 8, 8.

Due to the arrangement of the guide blade casing and the dischargingpipes, as above described, the lower member? of the guide blade casingand said pipes may be packed and adjusted once for all and need not bedisplaced at every inspection.

The upper member 6 of the guide blade casing is shown as guided by aradial .pin 15 in well-known way.

In expansions and contractions due to variations of temperature theturbine housing and the guide blade device will go together,

l areformed as plpes having I pansion stages,

mutual breaking stresses being thus avoided.

What I claim is 1. In an elastic-fluid turbine for axial admission, thecombination with the stationary housing and rotary system of the turbineof stays in said housing, separate channels in said stays, a guide bladedevice for said rotary system, a casing for said guide blade deviceincluding an annular mantle, and hollow supporting legs projectinglaterally from said mantle which communicate with the interior of saiddevice through holes in said mantle and are so positioned as to allowsupporting of the device by said stays with the legs in communicationwith the channels of the stays and with the axis of the guide bladedevice parallel or substantially parallel to the supporting plane ofsaid stays. p

2. In an elastic-fluid turbine for radial admission, the combination ofone or more ex pansion stages for axial admission, a stationary housingfor said turbine, aguide blade device for said expansion stages, acasing for said device comprising one upper and one lowermember,supporting legs on said lower member formed as discharge pipeslaterally projecting from said casing, stays in said turbine housing,channels in said stays, said legs being so positioned as to permitsupporting of said lower member by said stays with the legs incommunication with said channels, and means to guide said upper memberwith relation to saidstationary housing with said member resting on thelower member of the casing of the guide blade device. 1 v

3. In an elastic-fluid turbine for radial admission, the combination ofone or'more expansion stages for axial admission, a stationary housingfor the turbine comprising one upper and one lower member, stays in saidlower member, channels through said stays extending from'the upperto thelower side thereof, a guide blade device for said exa casing for saiddevice com prising one' upper and one lower member, supporting legsprojecting laterally from said lower member which are formed asdischarge pipes, said legs being so positioned as ,to permit supportingof said casing by said stays withthe hollow legs in communication withthe channels of the stays and with the axis of the guide blade deviceextending parallel or substantially parallel to the supporting plane ofsaid stays, means to guide the upper member of the casing with relationprovided in said housing, and hollow supporting legs laterallyprojecting from the lower section of said casing so as to permit placingof the casing on said surfaces, said hollow'legs communicating with theinterior of the casing and being open at their free ends in order topermit the discharge of drivin g fluid through the legs In testimonywhereof I have signed my name.

OSCAR ANTON VVIBERG.

tion to the upper member of the housing with 7 these" members resting ontheir respective lower members, and pipes connected to the channels ofthe stays at the lower surface of said stays. V

4. In an elastic-fluid machine, the combination of a housing, stationarymembers in said housing having plane supporting surfaces, a guide bladedevice and a casing therefor comprising one upper and one lower sec-

